結果
問題 | No.470 Inverse S+T Problem |
ユーザー | petite_prog |
提出日時 | 2020-04-04 18:37:28 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,607 bytes |
コンパイル時間 | 2,964 ms |
コンパイル使用メモリ | 199,264 KB |
実行使用メモリ | 6,400 KB |
最終ジャッジ日時 | 2024-06-01 23:02:17 |
合計ジャッジ時間 | 3,881 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 1 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 1 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 2 ms
5,376 KB |
testcase_26 | AC | 2 ms
5,376 KB |
testcase_27 | AC | 2 ms
5,376 KB |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
ソースコード
/* ∫ ∫ ∫ ノヽ (_ ) (_ ) (______ ) ヽ(´・ω・)ノ | / UU */ #pragma region macro #include <bits/stdc++.h> typedef long long int64; using namespace std; using P = pair<int64, int64>; typedef vector<int> vi; const int MOD = (int)1e9 + 7; const int64 INF = 1LL << 62; const int inf = 1<<30; template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; } #define REP(i, n) for (int i = 0; i < (n); i++) #define FOR(i,s,n) for (int i = s; i < (n); i++) #define ALL(obj) (obj).begin(), (obj).end() //コンテナじゃないと使えない!! #define debug(x) cerr << #x << ": " << x << "\n"; #define mp make_pair #define bn '\n' template <typename T> ostream& operator<<(ostream& os, const vector<T> &V){ int N = V.size(); REP(i,N){ os << V[i]; if (i!=N-1) os << " "; } os << "\n"; return os; } template <typename T,typename S> ostream& operator<<(ostream& os, pair<T,S> const&P){ os << "("; os << P.first; os << " , "; os << P.second; os << ")"; return os; } template <typename T> ostream& operator<<(ostream& os, set<T> &S){ auto it=S.begin(); while(it!=S.end()){ os << *it; os << " "; it++; } os << "\n"; return os; } template <typename T> ostream& operator<<(ostream& os, deque<T> &q){ for(auto it=q.begin();it<q.end();it++){ os<<*it; os<<" "; } os<<endl; return os; } vector<pair<int,int>> dxdy = {mp(0,1),mp(1,0),mp(-1,0),mp(0,-1)}; #pragma endregion //fixed<<setprecision(10)<<ans<<endl; struct StronglyConnectedComponents{ vector<int> topological_index; //属する強連結成分のトポロジカル順序 vector<bool> visited; vector<vector<int>> edge, edge_rev; vector<int> post_order; int N; int scc_size = 0; //強連結成分の数 //O(N+M) StronglyConnectedComponents(vector<vector<int>>& edge):edge(edge){ N = edge.size(); edge_rev.resize(N); for(int v=0;v<N;v++){ for(auto to:edge[v]){ edge_rev[to].emplace_back(v); } } visited.assign(N,false); topological_index.resize(N); for(int i=0;i<N;i++){ if(not visited[i]) dfs(i); } visited.assign(N,false); reverse(post_order.begin(), post_order.end()); for(auto v:post_order){ if(not visited[v]) dfs_rev(v,scc_size++); } } void dfs(int v){ visited[v] = true; for(auto to:edge[v]){ if(not visited[to]) dfs(to); } post_order.emplace_back(v); } void dfs_rev(int v, int idx){ visited[v] = true; topological_index[v] = idx; for(auto to:edge_rev[v]){ if(not visited[to]) dfs_rev(to, idx); } } //vが属している強連結成分のトポロジカル順序 int get_topological_index(int v){ return topological_index[v]; } //強連結成分の数 int get_scc_size(){ return scc_size; } vector<vector<int>> build_graph(){ vector<vector<int>> new_edge(N); for(int i=0;i<N;i++){ int topo = topological_index[i]; for(auto to:edge[i]){ new_edge[topo].emplace_back(topological_index[to]); } } for(int i=0;i<scc_size;i++){ sort(new_edge[i].begin(), new_edge[i].end()); new_edge[i].erase(unique(new_edge[i].begin(), new_edge[i].end()), new_edge[i].end()); } return new_edge; } }; tuple<string,string,string,string> get(string S){ auto S1 = S.substr(0,1); auto S2 = S.substr(1); auto S1_rev = S.substr(2); auto S2_rev = S.substr(0,2); return make_tuple(S1,S2,S1_rev,S2_rev); } int main(){ cin.tie(0); ios::sync_with_stdio(false); int N; cin >> N; vector<string> U(N); REP(i,N) cin >> U[i]; if(N>52){ cout << "Imposiible" << bn; return 0; } string S1,S2,S1_rev,S2_rev; string T1,T2,T1_rev,T2_rev; vector<vector<int>> edge(2*N); REP(i,N){ tie(S1,S2,S1_rev,S2_rev) = get(U[i]); for(int j=i+1;j<N;j++){ tie(T1,T2,T1_rev,T2_rev) = get(U[j]); if(S1==T1 or S2==T2){ edge[i].emplace_back(j+N); edge[j].emplace_back(i+N); } if(S1_rev==T1 or S2_rev==T2){ edge[i+N].emplace_back(j+N); edge[j].emplace_back(i); } if(S1==T1_rev or S2==T2_rev){ edge[i].emplace_back(j); edge[j+N].emplace_back(i+N); } if(S1_rev==T1_rev or S2_rev==T2_rev){ edge[i+N].emplace_back(j); edge[j+N].emplace_back(i); } } } StronglyConnectedComponents SCC(edge); bool valid = true; REP(i,N){ if(SCC.get_topological_index(i) == SCC.get_topological_index(i+N)){ valid = false; } } if(not valid){ cout << "Impossible" << bn; return 0; } //復元 トポロジカル順序が遅い方を採用 REP(i,N){ tie(S1,S2,S1_rev,S2_rev) = get(U[i]); if(SCC.get_topological_index(i)>SCC.get_topological_index(i+N)){ cout << S1 << " " << S2 << bn; }else{ cout << S2_rev << " " << S1_rev << bn; } } }